True pace, tyre degradation, pit cycles, chaos: measured, never guessed.
Seasons 2023 and 2024 are free.
Lando Norris's 2025 pole lap (1:09.511) in 3D, before the 2026 Grand Prix: 42.8 m of height and 7 braking zones.
Pace from clean laps only. Pit, safety-car, outlier and untimed laps are removed before anything is compared.
What to look for. Remove each kind of lap and watch the median line: it settles on the clean laps.
Lap time against tyre age for each stint. The slope is the degradation.
What to look for. Drag a lap up or down: the fitted line and its slope move with it.
Position before and after each stop, so the effect of the timing of a stop is visible.
What to look for. Move the stop earlier or later, then add a safety car in the window.
One score from 0 to 100 for how disrupted the race was.
What to look for. Each input fills its share of the 100 points up to its full scale.
The demos are illustrative: no lap, tyre or gap in them is real. Q4 runs the real Chaos formula on inputs you set. Real charts are in every race analysis, alongside DRS trains, dirty air, engineer notes, key decisions, a telemetry replay, team-radio links and an AI race engineer.
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Pace, tyre and pit estimates carry a Low, Medium or High confidence label. Each module sets it from the evidence behind its own figure, not only the number of clean laps. The Chaos Index is a measured score and carries no confidence label.
Low. Little evidence behind the figure (for pace, few clean laps). Read it with care.
Medium. A moderate amount of evidence behind the figure.
High. Plenty of evidence behind the figure.
Pit laps, safety-car laps, outlier laps and laps with no timing are removed from pace. The number of laps removed, by reason, is shown next to the figure, so it can be checked.
Pit Wall Engineer measures what happened in a session. It describes pace, wear and timing from data. It does not forecast results.
No. Pit Wall Engineer is an unofficial project and is not associated in any way with the Formula 1 companies.
Timing data comes via OpenF1 and FastF1. Live mode follows the OpenF1 feed.
Pace, tyre and pit estimates carry a Low, Medium or High confidence label based on the evidence behind them. The Chaos Index is a measured score and carries no confidence label. Exclusion logs give the number of laps removed, by reason. The numbers are signals about what happened, not predictions, and they can differ from the impression the broadcast gave.
Team-radio clips are links to Formula 1’s archive. Nothing is hosted or stored on Pit Wall Engineer.